# Callie - All in One Calculator — All in One Calculator > All-in-one calculator for math, unit conversion, and financial calculations. (iPhone/iPad app by The Clairos Group,LLC.) - Source: https://appshunter.io/ios/app/callie-all-in-one-calculator/id6756592855 (this page in markdown: same URL + `.md`) - Developer: [The Clairos Group,LLC](https://appshunter.io/developer/1861637162) - Category: Utilities, Productivity - Price: Free with in-app purchases - Rating: 5.00/5 from 3 App Store ratings · 3 written reviews indexed - Age rating: 4+ - Requires: iOS 16.0 · 32 MB - Languages: American English, Afrikaans, Amharic, Arabic, Bangla, Filipino, French (France), German (Germany), Greek, Hausa and 22 more - Released: 2025-12-18 - Data updated: 2026-08-14 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/callie-all-in-one-calculator/id6756592855/reviews.md ## What is Callie? Callie is an all-in-one calculator and everyday utility workspace for iPhone and iPad. Built for the small calculations that come up all day, Callie brings together a clean calculator, practical money tools, unit conversion, currency conversion, percentage math, and date tools in one focused native app. Whether you are splitting dinner, checking a sale price, converting measurements, comparing unit prices, counting days, or switching into scientific mode, Callie keeps the workflow fast, readable, and calm. MONEY & EVERYDAY COSTS Handle the money math that usually makes you pause. Callie includes tools for: • Tip Calculator • Bill Split • Sales Tax & Discount • Unit Price • Fuel Cost • Loan Payment • Currency Converter Quickly calculate tips, split totals between people, estimate sales tax and discounts, compare package value by unit, estimate trip fuel costs, or run a simple loan payment estimate. The Currency Converter uses public Frankfurter exchange-rate data, with searchable currencies, common currency shortcuts, favorites, recent selections, and local caching after your first successful update. CALCULATOR Use Callie as your daily calculator, then switch into Scientific mode when you need more. Basic mode is built for fast everyday arithmetic with clear input, memory controls, percent, sign toggle, backspace, and standard operations. Scientific mode adds support for trigonometry, logarithms, exponents, square root, square, reciprocal, π, e, and memory keys for multi-step calculations. UNIT CONVERSION Convert common measurements without digging through menus. Callie includes unit conversion for: • Length • Weight • Volume • Temperature Switch between common units like feet, inches, meters, miles, grams, pounds, liters, gallons, Celsius, Fahrenheit, Kelvin, and more. PERCENTAGE HELPER Solve everyday percentage questions faster. Use dedicated modes for: • What is X% of Y? • What percent? • Change by percent Great for discounts, comparisons, price changes, quick checks, and everyday math. DATE TOOLS Work with dates in a clear, simple workspace. Callie can calculate the difference between dates, add days or offsets, and compare ages or date spans. See total days and readable year/month/day differences without opening another app. PRIVATE BY DESIGN Callie does not require an account or sign-in. Calculator, money, unit, percentage, and date tools run on your device. Currency conversion uses public exchange-rate requests. Free users may see non-personalized banner ads, and a one-time Remove Ads purchase is available. BUILT FOR IPHONE & IPAD Callie is native on iPhone and iPad, localized for 32+ languages, and designed around a dark glass interface that keeps everything calm, readable, and organized. One app. Fast answers. Everyday math, beautifully organized. ## Key features - Classic calculator with history - Unit conversion for various metrics - Financial calculators (loans, tips, savings) - Date and age difference calculator - Privacy-first, on-device operation - Clean dark interface ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Remove Ads | $0.99 | one-time | ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/callie-all-in-one-calculator/id6756592855/reviews.md ### 5/5 — Great Calculator *2026-06-07* Fast easy to use and so many useful quick tools ### 5/5 — Callie calculator *2025-12-19* A+. Very simple to use and very functional ### 5/5 — Great app! *2025-12-19* This is so helpful when I’m shopping and trying to keep on my budget! ## Frequently asked questions about Callie ### What types of calculations can Callie perform? Callie can perform classic math calculations, percentage calculations, unit conversions for length, weight, volume, temperature, and speed, as well as financial calculations like loan payments, tips, and savings. ### Does Callie require an internet connection or an account? No, Callie is designed to work entirely on-device. It does not require an internet connection or any sign-ups or accounts, ensuring your privacy. ### Is Callie suitable for everyday use on an iPhone? Yes, Callie is optimized for iPhone with layouts that scale cleanly and controls sized for comfortable one-handed use. It features a clean dark interface for a focused user experience. ### How does Callie handle user privacy? Callie is privacy-first by design. It does not collect any personal data, does not use tracking or analytics, and works entirely on-device, meaning no information leaves your phone. ### What is the update frequency for Callie? Callie was last updated on December 18, 2025, with version 1.0. Future updates will depend on the developer's release schedule. ### What devices does Callie support? Callie is designed for iPhone and iPod devices. It is optimized for various screen sizes and orientations within these platforms. ### What is the age rating for Callie? Callie has an age rating of 4+, making it suitable for a wide range of users, including children and adults. ### Does Callie have ads? No, Callie does not contain advertisements. It is a free app designed without distractions. ## Version history (last 3 releases) ### 2.1 — 2026-07-15 Callie 2.1 makes everyday calculation faster and more personal. • A redesigned expression calculator with conventional percentages, repeat equals, persistent memory, history, and keyboard support • A new Algebra (CAS) workspace for simplifying, expanding, factoring, solving, differentiating, and integrating supported expressions • Floating liquid-glass calculator controls and four themes with custom colors • A purpose-built iPad calculator layout • Improved ad-banner clearance, localization, accessibility, and stability ### 2.0 — 2026-05-27 Callie 2.0 is a major update with a new native iPhone and iPad experience, a cleaner dark glass interface, expanded language support, and a new Currency Converter. New Currency Converter Callie now includes a built-in currency converter powered by public Frankfurter exchange-rate data. Search currencies by code, name, symbol, or common aliases, use common currency shortcuts, swap currencies quickly, and continue converting with cached rates after your first successful update. Expanded Language Support Callie is now localized across 32 language folders, with broader coverage across the app’s native tools and settings. Supported languages include: English Arabic German Greek Spanish French Italian Japanese Korean Portuguese Kinyarwanda Swahili Chinese Hindi Bengali Tamil Telugu Marathi Urdu Indonesian Vietnamese Thai Malay Filipino Hausa Yoruba Igbo Amharic Somali Zulu Xhosa Afrikaans New Native UI and UX Callie has been redesigned around a focused top navigation rail: Money, Convert, Calc, Dates, and More. The interface is cleaner, calmer, and easier to scan on both iPhone and iPad. Calculator Updates The calculator now has a refined Basic and Scientific experience, improved glass-style keys, memory controls, percent, sign toggle, backspace, and scientific functions including trigonometry, logarithms, exponents, square root, π, and e. Money Tools Money tools are easier to access and include Tip Calculator, Bill Split, Currency Converter, Sales Tax & Discount, Unit Price, Fuel Cost, and Loan Payment. Conversion and Date Tools The Convert workspace includes Unit Converter and Percentage Helper. Date tools include Date Calculator and Age Difference for quick date spans and offsets. iPad Improvements Callie now has a more polished iPad experience, including improved layouts and a custom iPad numeric input surface designed to match the app’s glass key style. Privacy and Stability Callie still requires no account or sign-in. Calculator, money, unit, percentage, and date tools run on your device. Currency conversion uses public exchange-rate requests, and typed values are not sent to Callie infrastructure. This update also includes localization audits, input handling improvements, layout cleanup, and general stability fixes across the native Apple app. ### 1.0 — 2025-12-18 No release notes. ## Apps similar to Callie | App | Rating | Price | Category | | --- | --- | --- | --- | | [SwiftFlow](https://appshunter.io/ios/app/swiftflow/id1267248933) | 1.8 (6) | Free | Utilities | | [All In One Calculator+](https://appshunter.io/ios/app/all-in-one-calculator-plus/id6757516116) | — | Free | Utilities | | [interCalculator](https://appshunter.io/ios/app/intercalculator/id1550864236) | 5.0 (2) | Free | Utilities | | [Khmer Calendar @](https://appshunter.io/ios/app/khmer-calendar/id1460945700) | 4.6 (709) | Free | Utilities | | [SMD decoder](https://appshunter.io/ios/app/smd-decoder/id6473452077) | 5.0 (1) | Free | Utilities | | [Discount Calculator - Percent](https://appshunter.io/ios/app/discount-calculator-percent/id1606471935) | 5.0 (5) | Free | Utilities | ## More apps by The Clairos Group,LLC - [Kora Real Estate Intelligence](https://appshunter.io/ios/app/kora-real-estate-intelligence/id6756619983) - [Journal - From Me Companion](https://appshunter.io/ios/app/journal-from-me-companion/id6762349686) - [Weather Direct](https://appshunter.io/ios/app/weather-direct/id6773316101) All apps by The Clairos Group,LLC: https://appshunter.io/developer/1861637162 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-14.*